#!/usr/bin/env python
#
# AutoLock.py
# Copyright (C) 2011 Piotr Foltyn
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


'''
http://stackoverflow.com/questions/865115/how-do-i-correctly-clean-up-a-python-object

When someone want to use this class, do the following:
lock = threading.Lock()
with AutoLock(lock) as _lock:
    #do something
'''
class AutoLock(object):
    def __init__(self, lock):
        self._lock = lock

    def __enter__(self):
        self._lock.acquire()

    def __exit__(self, type, value, traceback):
        self._lock.release()
